109 lines
3.0 KiB
C++
109 lines
3.0 KiB
C++
/**
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* @file _httplibcurl.h
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* @brief Declarations for internal class providing libcurl transport.
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*
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* $LicenseInfo:firstyear=2012&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2012, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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* $/LicenseInfo$
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*/
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#ifndef _LLCORE_HTTP_LIBCURL_H_
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#define _LLCORE_HTTP_LIBCURL_H_
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#include "linden_common.h" // Modifies curl/curl.h interfaces
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#include <curl/curl.h>
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#include <curl/multi.h>
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#include <set>
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#include "httprequest.h"
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#include "_httpservice.h"
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namespace LLCore
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{
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class HttpPolicy;
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class HttpOpRequest;
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class HttpHeaders;
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/// Implements libcurl-based transport for an HttpService instance.
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///
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/// Threading: Single-threaded. Other than for construction/destruction,
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/// all methods are expected to be invoked in a single thread, typically
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/// a worker thread of some sort.
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class HttpLibcurl
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{
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public:
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HttpLibcurl(HttpService * service);
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virtual ~HttpLibcurl();
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private:
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HttpLibcurl(const HttpLibcurl &); // Not defined
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void operator=(const HttpLibcurl &); // Not defined
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public:
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static void init();
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static void term();
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/// Give cycles to libcurl to run active requests. Completed
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/// operations (successful or failed) will be retried or handed
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/// over to the reply queue as final responses.
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HttpService::ELoopSpeed processTransport();
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/// Add request to the active list. Caller is expected to have
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/// provided us with a reference count to hold the request. (No
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/// additional references will be added.)
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void addOp(HttpOpRequest * op);
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int getActiveCount() const;
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int getActiveCountInClass(int policy_class) const;
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protected:
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/// Invoked when libcurl has indicated a request has been processed
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/// to completion and we need to move the request to a new state.
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bool completeRequest(CURLM * multi_handle, CURL * handle, CURLcode status);
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protected:
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typedef std::set<HttpOpRequest *> active_set_t;
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protected:
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HttpService * mService; // Simple reference, not owner
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active_set_t mActiveOps;
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CURLM * mMultiHandles[HttpRequest::POLICY_CLASS_LIMIT];
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}; // end class HttpLibcurl
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// ---------------------------------------
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// Free functions
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// ---------------------------------------
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curl_slist * append_headers_to_slist(const HttpHeaders *, curl_slist * slist);
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} // end namespace LLCore
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#endif // _LLCORE_HTTP_LIBCURL_H_
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